Menu
Bounties /Pin to ProfileBookmark
@JaySODec 06, 2022 — #You can use the
Example:
You can also use the
Example:
How do I check if a specific key exists in a JavaScript object or array?
Sign in
to post a answerDecember 6th, 2022JavaScript
1 Answer(s) ↴
1
possible answer
@JaySODec 06, 2022 — #You can use the hasOwnProperty() method. This method returns a boolean value indicating whether the object has the specified property as its own property (as opposed to inheriting it).Example:
const object = {
key1: "value1",
key2: "value2"
};
if (object.hasOwnProperty("key1")) {
// Do something if the object has the "key1" property
}
You can also use the
in operator to check if a specific key exists in an object or array. This operator returns a boolean value indicating whether the specified property exists in the object.Example:
const array = ["value1", "value2"];
if ("key1" in array) {
// Do something if the array has the "key1" property
}